package UDP;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class receiveMessage {
    public static void main(String[] args) throws IOException {
        //1.创建DatagramSocket对象（快递公司）
        //细节：
        //在接收的时候，一定要绑定端口
        //而且绑定的端口一定要跟发送的端口保持一致
        DatagramSocket ds = new DatagramSocket(10086);

        // 接收数据包
        byte[] bytes = new byte[1024];
        DatagramPacket dp = new DatagramPacket(bytes,bytes.length);
        ds.receive(dp);

        // 解析数据
        byte[] data = dp.getData();
        int len = dp.getLength();
        InetAddress address = dp.getAddress();
        int port = dp.getPort();

        System.out.println("接收到数据" + new String(data,0,len));
        System.out.println("该数据是从" + address + "这台电脑中的" + port + "这个端口发出的");

        //4.释放资源
        ds.close();




    }
}
